yycyyc

My truck is 1999 Grand cherokee Limited V8
1 week ago, the battery was died suddenly. Afer jumped it, it worked. When I turned off and locked my truck by remote key, 1 minute later, the air condition ran by itself with full speed. When I entered the key and put on the start position, the AC was off.
I thought the electronic problem of AC killed the battery.

Then I replaced a new battery. When I locked the truck, the AC did not runs it by itself.
BUT, after 1 week, it showed low battery. So I had to replace a new one again, and saw a mechinist. He found the battery still ran out when truck was turned off and locked. But no idea where was the problem.
Does someone has the same problem?

By the way, the AC sometimes still works when I turn it off, and I cannot control the direction of air flow when I am driving. I have no other problems, such as lights, doors.

Should I reprograme the BCM or PCM or something else?
Can I reset them by myself?

juvius

here's a link to a method of how to find what's draining your battery:
http://www.wikihow.com/Find-a-Parasitic-Battery-Drain